use of Three Fingers screen stutters

[SgA50s]

When three fingers are very close to each other and swipe from up to down and down to up  screen stutters and lags please look after this matter I think touch needs and improvement 

Thankyou 

[v3nom]

Which device are you using ? Does it have a screen protector?

[SgA50s]

Doesn't have screen protector on my Galaxy A50s....